WBCS MAIN 2018 P-3 Science-Technology & EVS

WBCS MAIN 2018 P-3 Science-Technology & EVS MCQ

WBCS MAIN 2018 P-3 Science-Technology & EVS One Liner

Topic 1: Chemistry

1. What is the formula of baking powder?
Ans: NaHCO3

2. From which plant is quinine extracted?
Ans: Cinchona

3. Which organic compound is used as a food preservative?
Ans: Sodium benzoate

4. Which isotope is used in cancer therapy?
Ans: Co60

5. What is the hybridization of carbon atom in benzene?
Ans: sp² hybridised

6. What is carbolic acid?
Ans: Phenol

7. Which heterocyclic compound is NOT aromatic?
Ans: Piperidine

8. Which oxide functions as a piezoelectric substance?
Ans: BaTiO3

9. What is used as a high-temperature lubricant?
Ans: Graphite

10. Which salt is dissolved in aqueous ammonia?
Ans: AgI

11. What type of reaction is Cl2 + 2NaOH = NaCl + NaOCl + H2O?
Ans: Disproportionation reaction

12. How is graphite used in a nuclear reactor?
Ans: As a lubricant

13. How can the black color of old oil paintings be cleaned?
Ans: By using H2O2

14. What is the hardest material among corundum, diamond, SiC, and B4C?
Ans: Diamond

15. How is NH3 gas dried?
Ans: By using Quick Lime

16. What is the function of V2O5 in the contact process for H2SO4 manufacture?
Ans: Catalyst

17. What is a thick mass of cement, sand, and water called?
Ans: Mortar

18. What is bronze an alloy of?
Ans: Copper and Tin

19. What is the process of very slow cooling in metallurgy called?
Ans: Annealing

20. Which metal is extracted from haematite using a blast furnace?
Ans: Fe (Iron)

21. What type of chemical bonding is present in diamond?
Ans: Covalent

22. Which element is mixed with silicon to derive a p-type semiconductor?
Ans: Aluminum

23. Which atomic defect is responsible for the reduction of bulk density of a material?
Ans: Schottky defect

24. What is the connecting material used in solar panels?
Ans: Selenium

25. Which is an example of artificial rubber?
Ans: Neoprene

26. What is produced from phenol and formaldehyde?
Ans: Bakelite

27. What are nucleons?
Ans: The sum of protons and neutrons in the nucleus

28. Which fuel produces the hottest flame on ignition with oxygen?
Ans: Cyanogen

29. Which material is used for producing automobile springs requiring high elastic property?
Ans: Steel

30. What is the crystal structure with cell dimensions a ≠ b ≠ c and α = β = γ = 90°?
Ans: Orthorhombic

31. Why is a pouch of SiO2 gel kept in medicine bottles containing capsules and tablets?
Ans: To absorb moisture

32. In nitrogen fixation by an enzyme evolving H2, how many electrons and protons are associated?
Ans: 8 and 6

33. What causes water hardness?
Ans: Presence of soluble salts of Ca+2 ions

34. What is the main constituent of biogas and natural gas?
Ans: Methane

35. What is the pressure-volume relation for a monoatomic gas undergoing adiabatic expansion?
Ans: PV^γ = Constant

36. What is the entropy of fluids at 0 K?
Ans: Zero entropy

37. What is the efficiency of a Carnot engine operating between 27°C and 127°C?
Ans: 25%

38. Which compound possesses zero dipole moment?
Ans: CCl4 (and BF3)

39. Which gauge is used for measuring very low vacuum of the order of 10⁻⁴ torr?
Ans: McLeod gauge

40. What is the water used in a nuclear reactor called?
Ans: Heavy water

41. What quantity remains constant in the isothermal expansion of an ideal gas?
Ans: Internal energy

42. How does the electrical resistivity of a semiconductor change with temperature?
Ans: Decreases with temperature

43. What is the efficient utilization of fly ash NOT recommended for?
Ans: Making synthetic stone chips

44. By which chemical reaction is biodiesel prepared?
Ans: Trans esterification

45. What makes water gas extremely poisonous?
Ans: Presence of CO

46. How is the quality of gasoline expressed?
Ans: Octane number

47. Which is an example of a complex salt?
Ans: K4[Fe(CN)6]

48. Which compound is used as rocket fuel?
Ans: Both Polybutadiene and N2H4

49. What form does molten sulphur take when poured suddenly into water?
Ans: Plastic sulphur

50. Which compound is used in safety matches?
Ans: P4S3

51. How is permanent hardness of water estimated?
Ans: Complexometric EDTA titration

52. What generates photochemical smog?
Ans: PAN (Peroxy acetyl nitrate)

53. What does chlorophyll contain?
Ans: Magnesium

54. Which gas is used to extinguish fire?
Ans: CO2

Topic 2: Physics

55. If the current through a resistance increases by two times, how much does the heat generated increase?
Ans: 4 times

56. In what form does the Earth receive the largest amount of energy from the sun?
Ans: Infrared and heat energy

57. What is the unit of electric power?
Ans: Watt

58. What are sound waves with frequency more than 20,000 Hertz called?
Ans: Ultrasonic

59. What is the spin of a ‘Boson’ particle?
Ans: Positive integer

60. What happens when electricity is passed through an electrolyte?
Ans: Chemical changes

61. Why does walking on a smooth floor cause fatal falls?
Ans: Grip of legs with the floor surface minimizes

62. What is the temperature-volume relationship for a gas undergoing adiabatic expansion?
Ans: TV^(γ-1) = Constant

63. What does IC stand for in computers?
Ans: Integrated Circuits

64. What does the quality of a musical note depend on?
Ans: Harmonics

65. What is the wavelength range of visible light?
Ans: 400 to 800 nm

66. What device converts AC to DC?
Ans: Rectifier

67. At what temperature does water have maximum density?
Ans: 4°C

68. What is the resistance of an ideal ammeter?
Ans: Zero

69. What type of spectrum is the solar spectrum an example of?
Ans: Line absorption spectrum

Topic 3: Biology

70. How is carbohydrate stored in the human body?
Ans: As glycogen

71. Where does the human eye form the image of an object?
Ans: Retina

72. What is the normal blood pressure range for humans?
Ans: 120/80 mm

73. Which is the universal recipient blood group?
Ans: AB

74. What is considered good cholesterol?
Ans: HDL

75. What causes goitre?
Ans: Deficiency of Iodine

76. What do plants convert dissolved nitrates from soil into?
Ans: Ammonia

77. What is the normal heart rate range for adults?
Ans: 70-80 times per minute

78. Which method combines desired characters of two plants?
Ans: Grafting

79. Which organ is NOT controlled by the autonomous nervous system?
Ans: Eyes

80. Where is blood filtered in the human body?
Ans: Kidney

Topic 4: Environmental Science

81. Where is BOD value maximum?
Ans: Sewage water

82. What harmful gas evolved during the Bhopal gas tragedy?
Ans: Methyl isocyanate

83. Which ray strikes the Earth due to depletion of the ozone layer?
Ans: Ultraviolet

84. What is responsible for the depletion of the ozone layer?
Ans: Chlorofluorocarbon

85. Which gas reacts with haemoglobin and produces toxic effects?
Ans: CO

86. Which statement about oil slick is false?
Ans: Oil slick in sea increases dissolved oxygen content

87. What is the largest reservoir of nitrogen gas in the environment?
Ans: Air

88. What is the aim of rainwater harvesting?
Ans: To recharge groundwater

89. In which ecosystem is grassland included?
Ans: Terrestrial

90. Which part of the atmosphere is richest in ozone gas?
Ans: Stratosphere

91. What assists in environmental protection?
Ans: Plantation and Forestation

92. What does the hydrosphere NOT cover?
Ans: Rocks

93. When is World Environment Day observed?
Ans: 5th June

94. Due to what is soil rarely contaminated?
Ans: Mineralisation

95. Which is NOT included within the atmosphere?
Ans: Lithosphere

96. What is a biodegradable pollutant?
Ans: Sewage

97. What is the first step of sewage treatment?
Ans: Sedimentation

Topic 5: Current Affairs & General Knowledge

98. Which award is given in the field of Science and Technology?
Ans: Shanti Swarup Bhatnagar Award

TOPIC-WISE SUMMARY

Topic No.Topic NameQuestion Numbers
1Chemistry1-54
2Physics55-69
3Biology70-80
4Environmental Science81-97
5Current Affairs & General Knowledge98

WBCS MAIN 2018 P-3 Science-Technology & EVS MCQ

Topic 1: Chemistry

1. Formula of baking powder is:

A. NaHCO3
B. Na2CO3·10H2O
C. Na2B4O7·10H2O
D. CaSO4·2H2O

Correct Answer: A. NaHCO3

3. Quinine is extracted from the plant of:

A. Poppy
B. Cinchona
C. Sandle wood
D. Palm

Correct Answer: B. Cinchona

4. The organic compound used as food preservative:

A. Methyl salicylate
B. Sodium benzoate
C. Sodium acetate
D. Sorbitol

Correct Answer: B. Sodium benzoate

5. The isotope used in cancer therapy:

A. Co58
B. C14
C. I131
D. Co60

Correct Answer: D. Co60

6. Carbon atom in benzene molecule is:

A. sp hybridised
B. sp² hybridised
C. sp³ hybridised
D. Not hybridised

Correct Answer: B. sp² hybridised

7. The carbolic acid is:

A. benzoic acid
B. phthalic acid
C. phenol
D. H2CO3

Correct Answer: C. phenol

8. Which of the following heterocyclic compound is not aromatic?

A. Pyridine
B. Pyrole
C. Furan
D. Piperidine

Correct Answer: D. Piperidine

9. The oxide functioning as Piezoelectric substance:

A. Al2O3
B. ZrO2
C. TiO2
D. BaTiO3

Correct Answer: D. BaTiO3

10. Which of the following is used as high temperature lubricant?

A. Mica
B. Asbestos
C. Graphite
D. Silicones

Correct Answer: C. Graphite

11. Which of the following salt is dissolved in aqueous ammonia?

A. PbCl2
B. Cu(OH)2
C. AgI
D. Al(OH)3

Correct Answer: C. AgI

12. The reaction of Cl2 + 2NaOH = NaCl + NaOCl + H2O is a:

A. substitution reaction
B. elimination
C. neutralisation reaction
D. disproportionation reaction

Correct Answer: D. disproportionation reaction

13. Graphite is used in nuclear reactor as:

A. Lubricant
B. Fuel rod
C. Control rod
D. Coating

Correct Answer: A. Lubricant

14. Black color of old oil painting can be cleaned by:

A. Cl2 water
B. H2O2
C. Nascent hydrogen
D. Oxalic acid

Correct Answer: B. H2O2

15. Which is the hardest material of the following?

A. Corundum
B. Diamond
C. SiC
D. B4C

Correct Answer: B. Diamond

16. NH3 gas is dried by using:

A. Conc. H2SO4
B. P2O5
C. Fused CaCl2
D. Quick Lime

Correct Answer: D. Quick Lime

17. In the contact process for the manufacture of H2SO4, V2O5 functions as:

A. oxidising agent
B. reducing agent
C. catalyst
D. neutralising agent

Correct Answer: C. catalyst

18. A thick mass of cement, sand and water is called:

A. Concrete
B. RCC
C. Mortar
D. Monolith

Correct Answer: C. Mortar

19. Bronze is the alloy of:

A. Copper and Zinc
B. Copper and Tin
C. Copper and Nickel
D. Zinc and Tin

Correct Answer: B. Copper and Tin

20. The process of very slow cooling in metallurgy is known as:

A. Quenching
B. Annealing
C. Hardening
D. Cold working

Correct Answer: B. Annealing

21. The metal extracted from haematite using blast furnace:

A. Zn
B. Cu
C. Al
D. Fe

Correct Answer: D. Fe

22. The chemical bonding in diamond is:

A. Covalent
B. Ionic
C. Coordinate
D. Metallic

Correct Answer: A. Covalent

23. For deriving p-type semiconductor, the element to be mixed with Si:

A. Phosphorous
B. Aluminum
C. Arsenic
D. None of the above

Correct Answer: B. Aluminum

25. Atomic defect responsible for reduction of bulk density of the material:

A. Schottky
B. Frankel
C. Interstitial
D. Electronic

Correct Answer: A. Schottky

28. The connecting material in solar panels is:

A. Si
B. Silver
C. Selenium
D. Cu

Correct Answer: C. Selenium

29. Which of the following is a artificial rubber?

A. Isoprene
B. Chloroprene
C. Neoprene
D. Teflon

Correct Answer: C. Neoprene

31. Phenol and Formaldehyde are used for the production of:

A. Caprolactum
B. Bakelite
C. PVC
D. Nylon 6

Correct Answer: B. Bakelite

32. Nucleons are the number of:

A. protons present in the nucleus.
B. neutrons present in the nucleus.
C. sum of protons and neutrons in the nucleus.
D. total protons, neutrons and electrons in the atom.

Correct Answer: C. sum of protons and neutrons in the nucleus.

33. Which of the following fuel produces hottest flame on ignition with oxygen?

A. C2H2
B. H2
C. Cyanogen
D. Butane

Correct Answer: C. Cyanogen

34. Which material is used for production of automobile spring requiring high elastic property?

A. Copper
B. Steel
C. Brass
D. All of the above

Correct Answer: B. Steel

40. The crystal having cell dimensions, a ≠ b ≠ c, α = β = γ = 90° has structure:

A. Tetragonal
B. Orthorhombic
C. Triclinic
D. Monoclinic

Correct Answer: B. Orthorhombic

47. In medicine bottles containing capsules and tablets, a pouch of SiO2 gel is kept:

A. to kill bacteria
B. to absorb bacteria
C. to keep bottle warm
D. to absorb moisture

Correct Answer: D. to absorb moisture

56. If an enzyme fixes nitrogen in plant by evolving H2, the number of electrons and protons associated with respectively are:

A. 6 and 6
B. 6 and 8
C. 8 and 8
D. 8 and 6

Correct Answer: D. 8 and 6

57. Water becomes hard due to presence of soluble salt of ion:

A. Al+3
B. Na+
C. K+
D. Ca+2

Correct Answer: D. Ca+2

58. Mention the main constituent of biogas and natural gas:

A. Ethane
B. Methane
C. Propane
D. Butane

Correct Answer: B. Methane

69. Pressure Volume relation for a monoatomic gas undergoing adiabatic expansion:

A. PV^γ = Constant
B. PV^γ-1 = Constant
C. TV^γ-1 = Constant
D. None of the above

Correct Answer: A. PV^γ = Constant

70. At 0 K, fluids are assumed to have:

A. minimum entropy
B. maximum entropy
C. zero entropy
D. a fixed value of entropy

Correct Answer: C. zero entropy

71. A Carnot engine operating between 27°C and 127°C has efficiency:

A. 21%
B. 22%
C. 24%
D. 25%

Correct Answer: D. 25%

72. Which of the following possesses zero dipole moment?

A. NH3
B. CCl4
C. BF3
D. H2O

Correct Answer: B. CCl4 and C. BF3 (CCl4 is more commonly cited)

73. The pressure gauge used for measuring very low vacuum of the order of 10⁻⁴ torr:

A. Bourdon pressure gauge
B. Hot filament ionisation gauge
C. McLeod gauge
D. inclined tube manometer

Correct Answer: C. McLeod gauge

75. The water used in nuclear reactor is called:

A. Hard water
B. Heavy water
C. Nuclear water
D. Critical water

Correct Answer: B. Heavy water

76. The quantity remaining constant in isothermal expansion of an ideal gas:

A. Heat content
B. Internal energy
C. Pressure
D. Pressure and Temperature

Correct Answer: B. Internal energy

77. The electrical resistivity of a semiconductor:

A. increases with temperature
B. decreases with temperature
C. does not change with temperature
D. increases at lower temperature but decreases at higher temperature

Correct Answer: B. decreases with temperature

78. The efficient utilisation of fly ash does not recommend for making:

A. portland fly ash cement.
B. fly ash based building bricks.
C. synthetic stone chips.
D. fillers in concrete.

Correct Answer: C. synthetic stone chips.

79. By which chemical reaction, biodiesel is being prepared?

A. Fermentation
B. Combustion
C. Polymerisation
D. Trans esterification

Correct Answer: D. Trans esterification

81. By which chemical reaction, biodiesel is being prepared? (Repeated)

A. Fermentation
B. Combustion
C. Polymerisation
D. Trans esterification

Correct Answer: D. Trans esterification

83. Water gas is extremely poisonous due to presence of:

A. N2
B. CO
C. H2
D. H2S

Correct Answer: B. CO

86. The quality of gasoline is expressed in terms of:

A. Octane number
B. Cetane number
C. Gold number
D. Reynold’s number

Correct Answer: A. Octane number

87. Which of the following is a complex salt?

A. Al(NO3)3·9H2O
B. K4[Fe(CN)6]
C. K2SO4·Cr(SO4)3·24H2O
D. Ca(OCl)Cl

Correct Answer: B. K4[Fe(CN)6]

89. Which compound is used as rocket fuel?

A. Polybutadiene
B. N2H4
C. N2H
D. Both (A) and (B)

Correct Answer: D. Both (A) and (B)

90. When molten sulphur is poured suddenly into water, it takes the form of:

A. milk of sulphur
B. flower of sulphur
C. plastic sulphur
D. colloidal sulphur

Correct Answer: C. plastic sulphur

91. The compound used in safety matches is:

A. P4
B. PCl3
C. P2O5
D. P4S3

Correct Answer: D. P4S3

94. Permanent hardness of water is estimated by:

A. Conductometric titration
B. Iodometric titration
C. Acid-base titration
D. Complexometric EDTA titration

Correct Answer: D. Complexometric EDTA titration

97. The photochemical smog is generated by:

A. HCHO
B. PAN (Peroxy acetyl nitrate)
C. Acrolin
D. Moisture

Correct Answer: B. PAN (Peroxy acetyl nitrate)

99. Chlorophyll contains:

A. Zinc
B. Iron
C. Magnesium
D. Cobalt

Correct Answer: C. Magnesium

100. The gas used to extinguish fire:

A. CO2
B. Ar
C. N2
D. CO

Correct Answer: A. CO2

Topic 2: Physics

24. If the current passing through a resistance increases by two times, the heat generated will increase by:

A. 2 times
B. 4 times
C. 6 times
D. 8 times

Correct Answer: B. 4 times

26. Largest amount of energy, the earth receiving from the sun is in the form of:

A. Infrared and heat energy
B. γ-rays
C. UV-rays
D. X-rays

Correct Answer: A. Infrared and heat energy

30. Electric power has the unit of:

A. Volt
B. Watt
C. Coulomb
D. Ampere

Correct Answer: B. Watt

35. Sound wave having frequency more than 20,000 Hertz is known as:

A. Ultrasonic
B. Supersonic
C. Microwave
D. Seismic

Correct Answer: A. Ultrasonic

36. Spin of ‘Boson’ particle is equal to:

A. positive integer
B. negative integer
C. positive integral multiple of 1/2
D. any fraction

Correct Answer: A. positive integer

37. When electricity is passed through an electrolyte, it undergoes:

A. physical changes.
B. chemical changes.
C. no physical or chemical changes.
D. dissociation into cation and anion.

Correct Answer: B. chemical changes.

38. Walk on a smooth floor causes fatal fall because:

A. grip of legs with the floorsurface minimises.
B. frictional force nil.
C. centre of gravity of body changes.
D. increase of forwarding forces.

Correct Answer: A. grip of legs with the floorsurface minimises.

39. Temperature (K) and volume (V) relationship of a gas undergoing adiabatic expansion (γ = Cp/Cv):

A. TV = Constant
B. TV^γ = Constant
C. TV^(γ-1) = Constant
D. TV^γ-1 = Constant

Correct Answer: C. TV^(γ-1) = Constant

41. IC in computer stands for:

A. Internal Circuits
B. Integrated Circuits
C. Integrated Current
D. Integrated Charge

Correct Answer: B. Integrated Circuits

42. Quality of a musical note depends on:

A. fundamental frequency
B. harmonics
C. amplitude of the wave
D. velocity of sound

Correct Answer: B. harmonics

43. Wavelength of visible light lies in between:

A. 400 to 800 nm
B. 500 to 1000 nm
C. 300 to 600 nm
D. 200 to 400 nm

Correct Answer: A. 400 to 800 nm

44. The device that converts AC to DC is called:

A. Transformer
B. Rectifier
C. Induction motor
D. Dynamo

Correct Answer: B. Rectifier

74. Water has maximum density at:

A. Room temperature
B. 0°C
C. 4°C
D. 100°C

Correct Answer: C. 4°C

92. The resistance of an ideal ammeter is:

A. zero
B. small
C. high
D. very high

Correct Answer: A. zero

93. Solar spectrum is the example of:

A. continuous emission spectrum.
B. band absorption spectrum.
C. line absorption spectrum.
D. continuous absorption spectrum.

Correct Answer: C. line absorption spectrum.

Topic 3: Biology

2. Carbohydrate stored in the body as:

A. glucose
B. starch
C. glycogen
D. sucrose

Correct Answer: C. glycogen

27. The human eye forms the image of an object at its:

A. retina
B. cornea
C. iris
D. None of the above

Correct Answer: A. retina

45. The normal blood pressure of human beings should remain in the range of:

A. 120/80 mm
B. 110/70 mm
C. 140/80 mm
D. 110/60 mm

Correct Answer: A. 120/80 mm

46. Universal recipient blood group is:

A. AB
B. O
C. B
D. A

Correct Answer: A. AB

48. Which one of the following is considered as good cholesterol?

A. VLDL
B. LDL
C. HDL
D. Triglycerides

Correct Answer: C. HDL

49. Goitre is caused by the deficiency of:

A. Vitamin A
B. Vitamin D
C. Iodine
D. Calcium

Correct Answer: C. Iodine

52. Plant absorbs dissolved nitrates from soil and converts them into:

A. free N2
B. urea
C. ammonia
D. proteins

Correct Answer: C. ammonia

80. The heart rate of adult persons should remain in the range of:

A. 50-60 times per minute
B. 70-80 times per minute
C. 40-50 times per minute
D. 90-100 times per minute

Correct Answer: B. 70-80 times per minute

82. The heart rate of adult persons should remain in the range of: (Repeated)

A. 50-60 times per minute
B. 70-80 times per minute
C. 40-50 times per minute
D. 90-100 times per minute

Correct Answer: B. 70-80 times per minute

84. The method by which desired characters of two plants can be combined:

A. Cutting
B. Layering
C. Budding
D. Grafting

Correct Answer: D. Grafting

85. Which organ is not controlled by autonomous nervous system?

A. Heart
B. Uterus
C. Glands
D. Eyes

Correct Answer: D. Eyes

98. Blood is filtered in the body through:

A. Liver
B. Kidney
C. Lungs
D. None of the above

Correct Answer: B. Kidney

Topic 4: Environmental Science

50. BOD value will be maximum in:

A. waste water
B. river water
C. rain water
D. sewage water

Correct Answer: D. sewage water

51. During Bhopal gas tragedy, the harmful gas evolved was:

A. Phosgene
B. Ammonia
C. Carbyl amine
D. Methyl isocyanate

Correct Answer: D. Methyl isocyanate

53. Which ray strikes the earth due to depletion of O3 layer?

A. Infrared
B. Microwave
C. Visible
D. Ultraviolet

Correct Answer: D. Ultraviolet

54. Which one of the following is responsible for depletion of O3 layer?

A. CO2
B. Chlorofluorocarbon
C. CH4
D. None of the above

Correct Answer: B. Chlorofluorocarbon

55. Which one of the following gases reacts with haemoglobin and produces toxic effect?

A. CO2
B. SO2
C. NO2
D. CO

Correct Answer: D. CO

59. Which one of the following statements is false?

A. River pollution is due to industrial and domestic sewage discharge.
B. Surface water contains a lot of organic matters and nutrients.
C. Oil slick in sea increases dissolved oxygen content.
D. Oil spill in sea causes heavy damage to fishery.

Correct Answer: C. Oil slick in sea increases dissolved oxygen content.

60. The largest reservoir of nitrogen gas in environment is:

A. Air
B. Earth’s Crust
C. Ocean
D. Plants and animals

Correct Answer: A. Air

61. The aim of rain water harvesting is to:

A. recharge groundwater
B. avoid floods
C. control soil erosion
D. conservation of freshwater

Correct Answer: A. recharge groundwater

62. In which ecosystem, grassland is included?

A. Marine
B. Freshwater
C. Terrestrial
D. Artificial

Correct Answer: C. Terrestrial

63. Which part of atmosphere is richest in O3 gas?

A. Stratosphere
B. Ionosphere
C. Exosphere
D. Magnetosphere

Correct Answer: A. Stratosphere

64. …………… assists in environmental protection.

A. Urbanisation
B. Nuclear explosion
C. Industrialisation
D. Plantation and Forestation

Correct Answer: D. Plantation and Forestation

65. Hydrosphere does not cover:

A. Oceans
B. Rivers
C. Glaciers
D. Rocks

Correct Answer: D. Rocks

66. World Environment Day is observed on:

A. 14th November
B. 27th February
C. 5th June
D. 5th September

Correct Answer: C. 5th June

67. Soil is rarely contaminated due to:

A. Acid rain
B. Chemical fertilizers
C. Pesticides
D. Mineralisation

Correct Answer: D. Mineralisation

68. Which one of the following is not included within the atmosphere?

A. Troposphere
B. Stratosphere
C. Lithosphere
D. Ozonosphere

Correct Answer: C. Lithosphere

88. Which of the following is a biodegradable pollutant?

A. Dye effluent
B. Bleaching effluent
C. Sewage
D. Heavy metals

Correct Answer: C. Sewage

95. The first step of sewage treatment:

A. Precipitation
B. Chlorination
C. Airation
D. Sedimentation

Correct Answer: D. Sedimentation

Topic 5: Current Affairs & General Knowledge

96. Which of the following award is being given in the field of Science and Technology?

A. Arjun Award
B. Bharat Ratna
C. Padma Bhusan
D. Shanti Swarup Bhatnagar Award

Correct Answer: D. Shanti Swarup Bhatnagar Award

TOPIC-WISE SUMMARY

Topic No.Topic NameQuestion Numbers
1Chemistry1,3-23,25,28-29,31-34,40,47,56-58,69-73,75-79,81,83,86-87,89-91,94,97,99-100
2Physics24,26,30,35-39,41-44,74,92-93
3Biology2,27,45-46,48-49,52,80,82,84-85,98
4Environmental Science50-51,53-55,59-68,88,95
5Current Affairs & General Knowledge96